Friction draft-rigging.



' ITO-839,783. P ATENT ED' DEC. 25, 1906.

O. S. PULLIAM- FRICTION DRAFT RIGGING. APPLIUATION FILED 11:13.25. 100a.

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m v a a z a Y z --.@U.-.H-f5 a ssi fl If r 7 7 M IINITED STATES PATENT OFFICE;

OSWALD s. PULLIAM, OF PITTsBUnG, PENNSYLVANIA.

FRICTION DRAFT -HIGGING.

Specification of Letters Patent.

Patented Dec. 25, 1906.

Application filed February 26,1906. Serial No. 302,996.

To. all whom it may concern:

Be it known that I, OSWALD S, PULLIAM, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of draw-banand 2 an extension or yoke at' Pennsylvania, have invented new and useful Improvementsin Friction Draft-Rigging, of

whlch the following is a specification.

The object of my invention is to provide a new and improved friction draft-rigging and to this end my invention consists of a friction draft-rigging, in the novel features of construction, and in the combination of parts,

jall as fully hereinafter described and claimed.

In the accomp anying drawings,.which illustrate an ap lication 0 my invention, Figure 1 is a to p an of a frictlon draft-rigging con-' structe in accordance with my invention; Fig. 2, a vertical sectional view,the section being taken on line II II of Fig. 1 and Fig. 3 a sectional view. taken on line III III of eferring to the drawings, l'designates a tached to the rear end of the draw-bar by bolts 3. These parts are located between the draftsills 4 of a car, and said draft-sills are formed with or provided with stop-plates 5, having inwardly-projecting flanges 6; The function of stoplates 5 is to limit the travel of two follower-p ates 7 and 7. I I

Located between and in contact with th followers 7 and 7 a I employ an outer main s ring 8. Within the main spring 8 is a suppgemental spring 9. Spring 9 is of lesslen th than spring 8 and is otherwise considera l'e' smaller than said spring 8.

Arranged-between main spring 8 and the sup lemental sprin 9 is a series of frictionor we ging plates on ars 10. In the form. of my mvention' as illustrated I have shown four of these friction-plates, but do not desire to be lilnited to the number shown. These plates are formed with outer and inner' corrugated or grooved contacting surfaces 11 and 12, said outer contacting surfaces 11 being in frictional contact with the coils of the main sprin and the inner contacting surfaces 12 in ictional contact with'the'supp1e' mental spring.

From the drawings it will readily be, seen that pressure exerted upon the followerplates 7 or 7 in either direction will tend to compress the outer s ring. This compression of the main spring moves thefrictionplates 10. inwardly against the inner s ring, causing a separation of the coils-o sald spring and creating'a tension on the inner-or a tenslon on the supplemental spring.

, By the formshown 1 produce a compression of the main-sprin a tension on the supplemental spring,- an provide in addition. thereto the. frictional contact-surfaces 11 and 12.

VVhat I claim is 1. A friction draft-riggi main s ring, a supplementa sprmg,.and a movab e wedge late or block interposed between and in iiictional contact with the springs arranged to be moved against the posed between and in frictional contact with the springs.

5. A friction draft-ri ging comprising followers, an outersprin %ocated between and of less length than the outer sprin and a tact wit the sprlngs arranged to create a tension on the lnner spring upon the compression of the outer spring.

6. A friction-draft-riggmgcomprising an outer s ring, an inner spring, and a frictionplate etween and in contact with said springs arranged to create a tension on the comprising a in contact with the fol owers, an inner sprlng supplemental spring which movement causes 7o supplemental spring upon a compression of series of corrugated or grooved plates interfriction-plate interposed between an in {con Q v v n 9 39353 inner spring upon the c0mpressi0n of the In testimony whereof I affix my signature outer spring. v I i L inpresence of two subscribing WitIlQSSGS. 7 A frlction draft-rigging comprising an 2 1 outer-s ring, an inner's ring, a. p urelit of' OSVV'ALD 'SxPULLIAM. groove plates located. etween and in ictional contact with the springs and fidapted -Witn'esses:'

v to create a. tension on the inner spring upon a' G. D00L1'1TLn,'-

Corhectidn 1 in Ltter s-" Pten 'tl N5. 339,783.

compression of the outer spring.

MARGARET HUGHEs.

, It ishereby e -tiicle'il that Iletters Patent Ive-339,783;gra t d December 25, 1906;

' owner of said invention; that said Letters Pa tent should have been issued to Pitts burgh Equipment Cbmpdni of Pittsburg, Pennsylvam'd, a orporiztionpf Pennsylvafiiw, as essig' nee ofthe entire interestin saiid patent, as shown hy the record of assignments-in this ofljce and that: the said Letters Patent shouhi be read with this correction therein that the same may eon'form to the record of the-case in the Patent Oflice. I

signed and sealed this 22d dey of January, A. 1)., 1907. V

' F. I. ALLEN,

7 Commissioner of Plume.

upon the appiication of Oswald S. ulliam, of Pittsburg, Pennsylvania, for an improv eme'ntin Friction Draft-Rigging Were' erroneously issued to said Pglliam as I M 1 .v Q

Q v v n 9 39353 inner spring upon the c0mpressi0n of the In testimony whereof I affix my signature outer spring. v I i L inpresence of two subscribing WitIlQSSGS. 7 A frlction draft-rigging comprising an 2 1 outer-s ring, an inner's ring, a. p urelit of' OSVV'ALD 'SxPULLIAM. groove plates located. etween and in ictional contact with the springs and fidapted -Witn'esses:'

v to create a. tension on the inner spring upon a' G. D00L1'1TLn,'-

Corhectidn 1 in Ltter s-" Pten 'tl N5. 339,783.

compression of the outer spring.

MARGARET HUGHEs.

, It ishereby e -tiicle'il that Iletters Patent Ive-339,783;gra t d December 25, 1906;

' owner of said invention; that said Letters Pa tent should have been issued to Pitts burgh Equipment Cbmpdni of Pittsburg, Pennsylvam'd, a orporiztionpf Pennsylvafiiw, as essig' nee ofthe entire interestin saiid patent, as shown hy the record of assignments-in this ofljce and that: the said Letters Patent shouhi be read with this correction therein that the same may eon'form to the record of the-case in the Patent Oflice. I

signed and sealed this 22d dey of January, A. 1)., 1907. V

' F. I. ALLEN,

7 Commissioner of Plume.

upon the appiication of Oswald S. ulliam, of Pittsburg, Pennsylvania, for an improv eme'ntin Friction Draft-Rigging Were' erroneously issued to said Pglliam as I M 1 .v Q

It ishereby certified that Letters Patent No. 839,783, granted December 25, 1906; upon the application of Oswald S. Pulliam, of Pittsburg, Pennsylvania, for an improve ment in Friction Draft-Rigging were erroneously issued to said Pnlliam as owner of said invention; that said Letters Patent should hare been issued to Pittabw'gh E 'quipnwnt Company, of Pittsburg, Pennsylvania, 0 empordtion of Pennsylvania, as nssignee of the entire interest in said patent, shown by the record of assignments in this oflice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 22d day of January, A. D., 1907.

l F. I. ALLEN,

Commissioner of Potenta.

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